Pros: It does as advertised.
Cons: $120 ($99 @ schiit.com) is a lot to for one purpose.... but so worth it.
Let me preface this review by explaining the issue I was dealing with.
I have always experienced digital noise from, I'm assuming, my poorly grounded laptop. It didn't matter if I used the headphone jacks or my Alessis i02 Express for recording/DAC (poor man's recording/DAC that I totally recommend if you're in a pinch). The noise I'm talking about is not static but rather a dynamic sound that follows closely to what my laptop is doing, for instance, if my fans rev up, I will hear soft glitchy sounds, almost like running water, that speed up and slow down. So basically whenever my laptop does something (download, play a dvd, connect cell phone) there is an audible response over my headphones. That noise has always taken up headroom and it was quite noticeable when I would put in my Westone UM2 IEM's. I honestly didn't think there was a way to clean up the signal so I just lived with it. But then I started getting into Schiit gear....
I got a Valhalla 2 to drive my Beyerdynamic DT880s (600 ohm) more appropriately than my other setup, and the digital noise started driving me mad. So I did what anyone does now-a-days and googled it. That's when I stumbled across the Schiit Wyrd Decrapifier. I was hesitant at first because the reviews were a little mixed about its functionality, but I figured if it doesn't clear up the signal I'll just return it. I received the Wyrd (along with a Modi 2 Uber) from Amazon today. The device installed immediately on my Win7 laptop, and before I switched my setup to the Modi 2 I wanted to see if the Wyrd would clean up the signal on my Alessis i02. It did and it was FANTASTIC! I really couldn't believe my ears, it was like I've been on an airplane this whole time with a constant whirring and churning, but now silence. No noise, no nothing. I had the same results when I put in the Modi 2 in place of the Alessis i02.
If you use USB in your audio setup, and you are experiencing some of the noise issues I talked about then I highly recommend this product. It's built like a metal brick right here in the USA, probably by Thor himself.... joke! But seriously this puts a new light on my listening experience and I just gotta say this Schiit rocks!
My first anything on head-fi.org, so forgive any of my errors.